Machine for making plywood patches or pieces of predetermined shape



Jan. 26, 1954 c. A. SHERMAN 2,567,193

MACHINE FOR MAKING PLYWOOD PATCHES 0R PIECES OF PREDETERMINED SHAPE 5Sheets-Sheet 1 Filed Oct. '7, 1948 IN V EN T 0R. 6241/65 A! Jae/man BYJan. 26, 1954 HERMAN 2,667,193

C. A.S MACHINE FOR MAKING PLYWOOD PATCHES 0R PIECES OF PREDETERMINEDSHAPE Filed Oct. 7, 1948 5 Sheets-Sheet 3 4 75 INVENTOR. fly. 6 7e 7? 66Cflar/es 6! She/mag? flTTOR/VEYS Jan. 26, 1954 c. A. SHERMAN MACHINE FORMAKING PLYWOOD PATCHES OR PIECES OF PREDETERMINED SHAPE 5 Sheets-Sheet 4Filed Oct. 7, 1948 INVEN TOR. C'kar/es r7. Ska/722m BY l7 7' TOR/VEYSJan. 26, 1954 c. A. SHERMAN 2,667,193

MACHINE F OR MAKING PLYWOOD PATCHES OR PIECES OF PREDETERMINED SHAPEFiled Oct. 7, 1948 '5 Sheets-Sheet 5 INVENTOR. Ckar/es AZ Sherman BYfiTTOR/VEYS Patented Jan. 26, 1954 MACHINE FOR MAKIN OR PIECES OF PREWeyerhaeuser Timber G PLYWOOD PATCHES DETERMINED SHAPE Charles A.Sherman, Tacoma, Wash., assignor to Company, Tacoma,

Wash., a corporation of Washington Application October 7, 1948, SerialNo. 53,248

14 Claims. 1

This invention relates to a patch routing machine for making patches orpieces of predetermined shape. More particularly, the machine hereindisclosed is designed for making wood veneer patches of oval shape to beused in patching plywood, but it will be understood that this machine isadapted for making patches or pieces or various other shapes and forother uses.

In the manufacture of plywood, after several sheets of veneer have beenglued together to form the plywood, it is often desirable to correctsurface imperfections by removing defective spots, such as pitchpockets, knots and the like, from the surface plies and gluing in placethereof patches of veneer. Usually these patches are of oval shape. Thedefective spots are commonly removed from the surface plies of theplywood by routing because this can be done quickly and easily andwithout digging into the inner or core plies to which the surface pliesare glued. In routing a. defective spot out of a surface ply so as toleave an oblong hole, it is necessary that this hole shall have roundedrather than pointed ends due to thefact that the routing tool isessentially a cylindrical tool. For this reason it is necessary toprovide oval patches, with rounded ends, to properly fit the routed outholes in the surface plies, and it is desirable to form these patches byrouting.

When single ply veneer is to be patched before it has been made intoplywood, this can be done in a satisfactory manner by sawing out defects50 as to leave, in the single ply veneer, holes with pointed ends and bysawing out oblong boat shaped patches with pointed ends to fit theseholes. However, as above pointed out, it is not practical to saw outdefects and leave oblong openings with pointed ends in surface pliesafter the veneer has been made into plywood, but is more practical torout out these defects thereby leaving oblong or oval shaped openingswith rounded ends which must be patched by using patches with roundedends.

It is an object of this invention to provide an automatic machine whichwill make oval shaped patches with rounded ends, inexpensively andaccurately, and at a high rate of speed.

Another object of this invention is to provide a patch cutting machinein which all of the operations are carefully and accurately timed andwaste of material is reduced to a minimum.

A further object of this invention is to provide a mechanism to causethe follower roller to, follow precisely the cam.

A further object of my invention is; the providing of a. variableangular fee-d control mechanism in a limited space.

A further object of this inventionis to; provide an electricallycontrolled hydraulic positioning mechanism.

One of the problems in cutting a veneer patch is the providing of asmooth cut edge and this in turn requires a rigidity of holding. Afurther primary object of my invention is the providing of a method andmechanism of holding the material from which the patch is being cut withsuch rigidity that a smooth out edge results. Accordingly, in additionto clamping the material, my object is to supplement the holding meansby placing the material under tension.

A further primary object of my invention is to eliminate complexmechanism and this is done in part by positioning the means whichactuates or causes the routing tool to follow a predetermined path bypositioning the said mechanism controlling the cam follower rollerimmediately beneath the cams and mounting the routing tool on the arm orleg of a U-shaped bracket axially above said follower roller, the saidfollower roller being mounted on the other arm or leg of said U-shapedmember. A further object of such a positioning is to provide forselectively engaging a plurality of cams for controlling the path of therouting tool.

A further primary object of my invention is to provide an electricalcircuit which will tie together all of the operating constituents ofthis machine and provide a balanced synchronised movement of all theparts.

A further primary object of my invention is to provide a suitable timeinterval between the finish cut of one patch and the shifting of thematerial for the next patch. This is accomplished by permitting therouting tool to idly continue in its path of movement while returning toits initial position for cutting.

A further primary object of my invention is to provide a clutch forvariably controlling the material feed mechanism for different sizes ofpatches.

A further object of my invention is to provide such a clutch as will beprecise in its control to avoid wastage of material.

The above mentioned general objects of my invention, together withothers inherent in the same, are attained by the mechanism illustratedin the following drawings, the same being preferred exemplary forms ofembodiment of my invention, throughout which drawings like referencenumerals indicate like parts:

Figure l is a top plan View of a plywood patch making machine embodyingmy invention, part of the supporting means for the material from whi hthe patches are made being broken away at one end of themachine;

Fig. 2 is a side elevation of the same, looking 3 in the direction ofbroken line 2-2 of Fig. 1, parts being shown in a different positionthan they are in Fig. 1 and parts being broken away;

Fig. 3 is a bottom plan view of the same looking in the direction ofbroken line 3-3 of Fig.

2 and with parts shown in section;

Fig. 4 is a sectional view with parts in elevation taken substantiallyon broken line 4--4 of Fig. 1, parts being omitted;

Fig. 5 is a sectional view with parts in elevation taken substantiallyon broken line 5-5 of Fig. 1, and on a larger scale than Fig. 1;

Fig. 6 is a detached sectional assembly View showing bracket arm meansby which a router tool is carried and guided together with bearing meansin table supporting the same;

Fig. '7 is a detached fragmentary view partly in section and partly inelevation showing hydraulically operated devices for applying orpositioning the patch making material to the router tool and securelyclamping the same while a patch is being made;

Fig. 8 is a detached elevation of an adjustable precise clutch-like feedcontrol device for fully controlling the feed of a veneer strip to thepatch making tool;

Fi 9 is a sectional view taken substantially on broken line 9-9 of Fig.8;

Fig. 10 is a sectional view taken substantially on broken line Iii-l llof Fig. 9;

Figs. 11 and 12 are respectively a face view and an edge view of aneccentric disc embodied in this clutch-like feed control device;

Figs. 13 and 14 are respectively a face view and an edge view of anoscillatory plate embodied in this clutch-like feed control device;

Figs. 15 and 16 are respectively a face view and an edge View of aroller adjusting cage embodied in this clutch-like feed control device;

Fig. 16A is a detached fragmentary sectional view of a modified form ofroller and roller cage means which may be used in said clutch-like feedcontrol device characterized in providing extremely high degree ofaccuracy;

Fig. 17 is a detached plan view of a cam member embodied in theinvention as representative of a plurality of cams which may be used andas well as of diiferent types of cams;

Fig. 18 is a plan view of a patch made by this machine;

Fig. 19 is a fragmentary plan view of a strip of veneer from which somepatches have been cut;

and

Fig. 20 is a diagram showing electrical control means for the hydraulicmaterial positioning means and other constituent elements of themachine.

This patch making machine comprises a horizontal table top i2,preferably of rectangular shape, supported on legs 13. The table top I2is provided adjacent the side which is shown uppermost in Fig. 1 withtwo spaced apart aligned longitudinally extending raised portions I4 and15. The inner ends of these two raised portions Hi and 15 are spacedapart to provide room there- .between for patch making tools ashereinafter described. Preferably, the raised portion l5 shown at theright of Figs. 1, 2 and 4 extends beyond the end of the table and isconnected with means, such as frame i6 carrying transfer rolls ii, uponwhich are supported strips [8 (Fig 4 and 19) of veneer or othermaterial, from which patches i8 (see Fig. 18) are to be made.Longitudinally extending upwardly protruding spaced apart parallel guideribs it are provided along the respective edges of the-raised portionsl4 and 15 to serve as guide means for the strips H! from which patchesare to be made.

The strips l3 of veneerstock can be of any desired length. For makingpatches of the type ordinarily used in patching fir plywod these stripscan be about two and one half inches wide.

The strips of stock it from which patches are to be made are stacked insuperimposed relation on the rolls l'i, Figs. 1, 2 and 4, with theiradvanced end portions overlapping the table member l5 and with the endsof all of the strips 13, except the lowermost one, resting against anupright stop member 23. The bottom end portion of the stop member 23 ispositioned high enough above the frame of the table member l5 so that thlowermost strip it will pass thereunder, but all strips above thelowermost strip will be stopped thereby. Preferably the strip engagingface of the upright stop member 20 is positioned a short distance to theleft of the axial vertical plane of a feed roll 21, as respects theshowing in Fig. 4. This permits the leading end portion of the lowermoststrip i3 initially to be positionedon the feed roll 21 in starting themachine and superimposed strips It will successively drop down on thisfeed roll 21 and feed to the left, Fig. i, as the machine operates. A

weight 24 is guided for vertical movement on upright frame posts 22 andrests on the uppermost strip l8 of the pile. This weight 2| is heavyenough to hold the strips l8 down and prevent slippage between the roll21 and the lowermost strip 18. An opening 2 l in the weight 2| providesclearance for the stop member 26. Preferably the stop member 23 isvertically adjustably supported from a bracket 23 which is secured tothe frame. This makes it possible to correctly adjust the stop member 29vertically to control the feedlng of strips l8 of different thickness.These strips will be successively fed to the left through the machine asrespects the showing in Figs. 1 to 4 inclusive by means which will nowbe explained.

The feed roll 21 and other feed rolls such as rolls 25, 26 arerotatively supported beneath the table l2 by hearing means 28. Each feedroll 25, 26 and 21 has a serrated or roughened peripheral surface forengagement with the strips I8 of material to be fed. An opening 29 isprovided in the table l2 above each feed roll 25, 26 and 21, see Fig. 4,and each feed roll is positioned with its uppermost peripheral portionsubstantially flush with the top surface of the portion of the tableover which the strips 18 pass.

A hold-down roll 30 is resiliently supported above each of the drivenrolls 25 and 2B. The supporting means for the hold-down rolls 30 ispreferably of the type shown in Figs. 1, 2 and 4, and is in duplicate ateach end of each of said rolls 30. This supporting means at each end ofeach roll 30 preferably comprises a bearing yoke 3| rotativelysupporting an end portion of the roll and slidable on two spaced apartupright posts 32 which are fixedly supported by the frame [2. A crossyoke 33 is adjustably supported on the upper end portions of each pairof posts 32 and is connected with the frame l2 by adjusting screws 34.Compression springs 35 are provided on the posts 32 between the yokes 3|and 33. The

, springs 35 yieldingly urge the rolls 30 downwardly and the pressure ofthese springs can be adjusted by means of the screws 34.

' The two driven rolls 25 and 26 are spaced a substantial distance apartand the devices for making the patches. are positioned between these twodriven rolls, and between the adjacent ends of the raised portions l4and [5 of the table l2. At this location the table. I2 is provided witha cylindrical cam receptacle 36, Fig. 5, which extends below the planeof the table. The. lower edge. portion of the cam receptacle 36 has aninwardl v extending flange 31. The flange 31 cooperates in supporting. aplurality of cam members, such as 38, 39. and 40, which are disposedwithin the receptacle 36 and fixedly secured thereto as by bolts 24'.

The three cams 38, 39 and 40 herein shown have cam tracks or openings38', 39 and 40' which are of generally oval or elliptical shape but itwill be understood that. the shape of these cam tracks will bedetermined by the shape of the patch which it is desired to make. Alsoit will be understood that the machine can be provided with one or morecams depending on the number of difl'erent size of different shapepatches to be out, provided shapes of cams are non-interfering.

The means for supporting the patch material while the patch. is beingrouted out of the same, comprises two spaced apart parallel horizontalplates 4! and 42 positioned one above another and positionedrespectively above and below the path of the strip 18 of material fromwhich the patches are being cut so that the strip is can beintermittently advanced between said plates and can be clamped betweensaid plates while the patches are being routed out. The two plates 4|and 42 are. respectively provided with centrally disposed openings 43and 44 for a tool to operate through and for the routed out parts todrop through, as hereinafter described.

The uppermost plate 4|, see Figs. 5 and 7, is wider than the lowermostplate 42 and said uppermost plate 4| is. supported, preferably at four 1points, on upstanding lugs 45 on two spaced apart parallel supportbrackets 46. Screws 4! secure the plate, 4| to the lugs 45. The brackets45 rest upon and are secured to the table i2, as by screws 48, andextend crosswise of the path of movement of the strips of patch makingmaterial I8.

The lowermost plate 42 may move in the space between the lugs. 45 on thebrackets 45, aswill be. described. In this arrangement, the uppermost.plate 4| may be said to extend transversely across said space.

The lowermost plate. 42 is narrower than the upper plate. 4| and extendsbetween the lugs 45 of the brackets 45 and is guided for verticalmovement. relative to the upper plate 4| by dowel pins 49 which arerigidly secured to one of the plates, such as plate 42, and are movablein suitable holes in the other plate 4|. In other words, the lowermost.plates may be said to be within the. space between said lugs 45 of saidtable. Preferably, at. least portions of the-ends of both plates 4| and42 between which the material first enters are inclined or beveled asshown in Figs. 2. and 4, to facilitate the entrance of strips l8 ofmaterial therebetween and to lessen the danger of choke up at thislocation. The dowel pins 49 act as, guide. means for the edges of thestrips $8. The. strips. l8 of material pass between the two plates 4|and 42 and the lower plate 42 is adapted to be lifted to apply the strip|8 of material to a routing tool 6| hereinafter described. The means forlifting the lowerplate 42 preferably com:- prisestwo hydraulic liftingcylinders 55 and 5|, Figs. 4- and '7, of duplicate constructionpositioned underneath therespeetive end portions of the plate '42 andconnected by conduit means I 42: with an oil control valve I66, asdiagrammatically shown in Fig. 20. The hydraulic cylinders 50 and 51,see Fig. 7, can be secured by cap screws 52 to the adjacent supportbracket 46. Each hydraulic cylinder 50 and 5|, see Fig. 7, is providedwith a piston 53 which has a downwardly directed cup rubber 54. Eachpiston 53 preferably carries a ball-spacer member 55 which is positionedin engagement with the lower plate 42. Preferably a rubber cap 56 isprovided on each cylinder 50 and 5|. Also preferably a spring 51 isprovided below each piston to take up slack and prevent lost motion ofthe piston and parts connected therewith. Means hereinafter describedare provided for supplying fluid, such as oil, under pres sure to thelowermost end of each cylinder 50 and 5|.

The cylinders 50 and 5| constitute what may be termed a cutting controlor positioning means for establishing intermittent cutting relationshipbetween the cutting tool and the material.

A plurality of springs 58 are connected with the lower plate 42 orreturning said plate 42 to a lowered position after it has been raisedand for holding said plate 42 in its lowermost position except when itis raised by the admission of fluid under pressure to the cylinders 50and 5|. The admission of fluid under pressure to the cylinders 50 and 5!will archingly and tensionally move the strip is upwardly into clampingposition and clamps said strip It as well as applies the same to therouting tool BI.

The routing means and controlling and operating devices therefor, seeFigs. 5 and 6, comprises a router motor 60' carrying a routing tool BIand supported by an upper swinging arm 62' of a bracket of generalU-shaped form. Preferably, the motor es is a high speed motor as therouting tool will do smoother and more efiicient work when it isoperated at very high speed.

The swinging arm 62 is fixedly secured to an upright tube 63 whichextends downwardly through an arcuate slot 54 in the table I2. Below thetable 2, the tube 63 is fixedly secured to a lower swinging arm. 65which is parallel with and extends in the same direction as the upperswinging" arm 62 forming the said U-shaped bracket. The outer endportion of the lower swinging arm 65 has a hub 66, Figs. 2', 3, 5 and 6,within which an upright spindle 67 is adjustably supported. A cam rolleror follower 58 is rotativelymounted' on the upper end portion of thespindle 6i and is adapted tobe selectively positionedin engagement withthe track of either one of the cams 38, 39 or 45 ashereinafterexplained. Screw means '59, Fig. 5, in the hub 66 is adaptedto be positioned within selected annular notches 16 in the spindle 6? tohold the spindle in adjusted positions and a knob 1| is provided on thelower end of the spindle 51 to facilitate adiustmentof saidspindle.

The two swinging arms 52 and 55 and the tube as are rigidly securedtogether and operate as one integral U-shaped part. The two arms 62 and65 are spaced a substantial. distance apart- The arm t2 operates abovethe table l2 and the arm 65 operates below the table i2. Suchpositicning of the arms or" the U-shaped. bracket with respect to thetable provides for simple construction, non-interference with feeding.of, material, and efficient. and compact arrangement of. the

cam means: with respect toithe material on; the

one side and the. reutingtocl control means on.

the other. The axis of the routing tool 6! and the axis of the roller 68preferably 'are aligned witheach other and move in similar paths forsimplicity of construction and accuracy of operation.

a Two axially aligned bearing members 72 and .73 extend outwardly fromthe end portions of the respective swinging arms 62 and 65 adjacent thelocations where these arms are fixedly secured to the tube 63. Twoinclined support arms I4 and I each have one end portion thereofpivotally mounted on the respective bearing members 12 and 13,preferably by ball or roller bearing means I6. Nuts 11 can be used tosecure the support arms I4 and I5 on the bearing members I2 and I3.

. The otherend portions of the support arms I4 and I5 are pivotallyconnected with a hubbed portion I8 of the frame or table i2 as byupright bearing means I9. As the cam roller 68 follows the track surfaceof one of the cams 38, 39 Or 46 the bearing members I2 and I3 will bemoved on an are about the axis of the bearing means 79 and the routingtool 6|, which is coaxial with the roller 68, will be moved in a pathsimilar to the path of movement of the roller 68.

- The means for holding the roller 68 against the track surface of aselected one of the cams 38, 39 or 40 and for imparting movement to saidroller 68 in a path determined by the shape of the cam track, see Figs.2, 3 and 5, comprises a sliding yoke 88 having a hub portion 8|, Fig. 5,provided with relatively long antifriction bearing means 89 throughwhich the spindle 67 passes. The yoke 80 is slidably mounted preferablyon two spaced apart parallel guide rods 88 and is movable on said guiderods 88 in directions transverse to the common axis of the earns 38, 39and 40. The guide rods 88 are supported in brackets 82. The brackets 82are rigidly secured to a gear wheel 83 and extend downwardly from saidgear wheel. The gear wheel 83 is rotatively mounted on the downwardlyextending table portion 36 which forms the cam receptacle. Preferablyball bearing means 84 is used in mounting the gear wheel 83 on the camreceptacle 36. Thus flat -retaining rings 85 are used to preventrelative longitudinal displacement of the gear wheel 83 and bearingmeans 84. The gear wheel 83, meshes with another gear wheel 86 by whichit is driven. The last mentioned gear wheel 86 is con .nected with anupright driven shaft 81. The

shaft 8'! can be continuously driven durin the operation of the machine.Two tension springs I38 are provided alongside of the yoke 80 toyieldingly urge the roller 68 against the cam track 38', 39 or 40', withwhich said roller is engaged. One end portion of each spring I38 isconnected, as by pin means I39, with the gear wheel 83 and the other endportion of each spring I38 is connected, as by pin means I40, with theyoke 80. I

As the guide rods 88 are carried by the gear wheel 83 and the cams 38,39 and 40 are fixedly 1 supported by the table l2, it is apparent thatrotation of the gear wheel 83 will rotate the guide rods 88 and the yoke80 relative to the cams. The yoke 80 carries the roller 68 and as thisyoke is rotated about the axis of the gear wheel 83 the springs I38 willbe rotated therewith and will yieldingly hold the roller 68 against acam track such ascam track 40. This will move the roller 68 in a pathdetermined by the shape of the cam 40' and will move the tool 6| inasimilar path. The cams herein illustrated, see cam 40, Figs. '7 and,1'7,are of oval. shape and hence the tool 6| 1 secured to said pins.

will be moved in an oval path to rout out an oval shaped patch I8 from astrip I8, see Figs'.'18 and I9. V p

The strip I8 from which patches are to be made is intermittentlyadvanced by the feed rolls 25, 26 and 21. As the machine is designed tomake patches of different size it is desirable to provide means foradjusting the distance which a strip will be advanced each time the feedoperates. This is accomplished by providing an adjustable clutch meansdesignated generally by 90. The clutch means 90 is mounted on a shaft 9|which carries the feed roll 26. The feed T011525 and 21, see Fig. 3, aredriven from the shaft 9| by link belts 92 and 93 respectively operatingon suitable sprocket wheels on the shaft 9| and on the shafts of saidfeed rolls 25, 26 and 27.

The clutch means 90, Figs. 8 to 16, comprises a cylindrical drum 94having a hub 95 which is rigidly secured as by a key 96 and screw 91 tothe shaft 9! which carries the feed roll 26. Preferably a hardened steelring 98 is fixedly secured within the drum 94, as by shrinking the drum94 on said rin 98. This ring 98 provides a hardened bearing surface withwhich a steel roller 99 can be engaged to transmit intermittent rotarymotion to the drum 94 and shaft 9|.

The roller 99 is freely and rotatively disposed between two pins I00which function as a cage to position said roller. The pins I00 aresecured to and carried by an adjusting plate |0I which is rotativelysupported on the shaft 9| external to drum 94. A yoke I02 extends acrossthe ends of the pins I00 within the drum 94 and is rigidly Another yokeI03 extends across the pins I00 adjacent to the adjusting plate HM andis welded or otherwise rigidly securedto said pins I00. The yokes I02and I03 cooperate with the pins I00 in forming a cage for the roller 99and contribute to the strength and rigidity of the cage unit thus formedby the parts I00, IOI, I02 and I3. The adjusting plate |8| carriesanother fixedly secured pin I04 which extends in an opposite directionfrom the pins I00 and is positioned in the path of an adjusting leverI05. A spring I94 yieldingly urges the adjusting plate |0I in aclockwise direction as respects the showing in Fig. 8 thus urging thepin I04 against the lever I05. The lever I05 is pivotally mounted on theshaft 9|. The outer end portion of said lever I05 is provided with aretractable spring pressed pin I86 which is adapted to be positioned inany selected one of a plurality of holes II]? in a fixed plate I 08. Theplate I08 is secured to the frame I2 of the machine. Preferably the pinI06 is urged toward the plate I08 by a spring I09, Fig. 9, which isdisposed in an inner tubular handle member H0 on a shank portion III ofthe pin I96 and presses against a collar I I2. The outer end portion ofshank III carries a nut II 3 which engages with the outer end portion ofan outer handle member 4. The outer handle member II 4 is slidablymovable on the inner handlev member 0. Obviously an outward pull on theouter handle member 4 will withdraw the pin I08 from any hole I01 withinwhich it is engaged and permit angular adjustment of the cage whichcarries the roller 99.

An oscillatory plate I I5 is pivotally mounted on the shaft 9| betweenthe drum 94 and the adjusting plate I0 I. An eccentric disc I I6 ismounted for oscillation on the shaft 9| and secured to the .plate 5 asby dowel pins II! and a cap" screw II 8. A ring II 9 of hardened metalis freely rotatively mounted on the eccentric disc I It. 'fhe ring II isadapted to be moved into engagement with the roller 99 by rotativemovement of the eccentric disc H6. A flange I29 011 the disc H6 helps toprevent displacement of the ring H9.

An aruate slot IZI in the oscillatory plate HE is provided for the pinsI to extend therethrough. I

Preferably hearing sleeves I22 are provided on the shaft 9| for each ofthe members I It; I m and Its. Preferably ehii portibn's of thesesleeves are outwardly flanged as shown in Fig. 9 to serve as spacermeans and tohelp prevent longitudinal displacement of thesleeves. A setcollar 23 can be provid d on the shaft 9| in- Wardly frogn the lever I.

The oscillatory plate I prefeia iy a portion I24 to which a bearing binI25 is sec-hr d. A connecting rod I25, Fig. 2', is conheeteii "1ththehearing pin I25 by heating m ans I21- The lowers-21d portion of theconhectih'g'red I26, see Fig. 2', is connected by bar'ifig means fitwith a cfa'iili pih I2 on a. disc I39. The disc Hill is secured to anintermittently driven horizontal shaft I 3!. Preferably'niea'ns areprovided for ad'- jus'tihg the length of the connecting rod I21? nutmeans I26; This can he done by adj ustatily connecting one or both ofthe bearing means I27 and I28 with said connecting red I 25.

The clutch shown in Figs. 8 to 16" operates in a inannersii'nilar to aratchet to rotate the shaft 9| through a predetermined angle and therebyadvance a strip I8 of patch material a predetermined amount each timeone complete revolution is imparted to the shaft I3 I. Operation ofsaidvshaft I3I is controlled by one revolution clutch. means which may he ofa form diagrammatically shown in Fig. '20 and hereinafter de= scribed.

Each time one complete revolution is imparted to the disc I 35] theoscillatory plate II5-will be angularly moved from a starting pointthrough a predetermined angle and back to the starting point. Assumingthat the plate I I 5 is at its starting point when in the position shownin Figs. 2} 8, 9 and 10, one revolution of the disc I30 will firstmovesaid plate I I5 counter-clockwise as 1'- spects' the showing in thesefiguresand will then move it clockwise back to itsinitial position.Movement of said plate H5 counter-clockwise will turn the eccentric discI I6 COUIItETrGlOCkWiSQ and cause the ring III to engage with and jam,against the roller 99 thus locking all of the parts H5, H6, H9, 99, IIIIand I04 together and angu= larly moving them counter-clockwise'to theend of the stroke. The shaft 9| is secured to the drum 94 and will be;angularly moved counter clockwise therewith. This will impart a predetermined amount of movement to'the' feed rolls 25, 25 and 2-? and willmove a strip IBof patchmaking material to the left, Figs. 1, 2 and 4, adis tance which has been predetermined by the: set: ting: of theadjustinglever I 05'. When the as: justiiig plate IIH is movedcouhter-cleehwise the pin I!!! thereon will be moved away front-the 'a'djusting lever H and the tension spring I04 wili beelongated. At thispoint it is to be noted that the position of the adjusting lever I 05determines the starting position of the adiilstifigiilit'e IIII which inturn determines the sta lii'g or initial position of the roller 99. Theinitial" position of this roller 99 determines the point in the strokeof the' oscillatory plate H5 at which the clutch will efigag'e and'begin 94 and this determines the distance through which a strip I8 ejfhatch making material will be advanced at eachstrcke, as Fig. 19. A

When the tsc'iiiatory plate II5 beg ns to moveclockwise oh the up strokehi the cehneeting t e I26, the c li'ltch will release ans the time; 34will remain stationary wh e the other harts ete back to their initialiiosition; as Its will move the eq ifistihs mate it I an i rgiiet 7 backto their initial petition in which the pin I04 ies'ts against t eadjusting lever I55. oscillatory piate H5 and eccentric disc II'B continue' their movement after the roller 99 stopped and thus have adistance of over travel I ment of the strip" Is of patch makingmaterialis proportional to movement tithe drum 5H thus the movement of the stripI8 be actjuste'd to co patches of di'ifer'en't size. N v

When patches I8 are cut loo'e from thestr'iie I8, Fig. 5; they drop on aplate I53 which eve the top earn as and are discharged from the of themachine by a reci ptocable pus er member I34. The pusher member I34- issecured t9 the side plates 35 which are efi 's 'edhetween the stipportbrackets 46. Saidpusher member I 3!} anti the plates I35 a'r'e re i rcated by a conheetfiig rod I 36'whi'ch ha's one end portion pivot/anyeeri nected with a cra khiehibei I31. she member I31 is secured to thedriven shaft st.- The pusher member I34 is'synchron-iz'etl so that itwill always be in a retracted position; as" in Fig. 5, when the patchesdrop; 7

Fig. 20 shows diagrammatically the electrical and hydraulic controlmeans for this" machine This control nieariss'ynchroniz'e'sthe operationof the patch cutting-means and the strip feed meansandoperatesconnectionwith the two shafts 81 and BI nereinbefore described.-

Referring to t e diagram, Fig; 20, a cam 'I5I is synchronized with; thepath-movement of the patch making tr al and revolves at the sa espeedand in the same position relations This can" be accomplished by drivingthe c m I5I on or the shaft Iil b'y gear means having the same ratioasser' stand as; as illustrated in Fig. 20. A cam follower I on this eastIJSI o erates acontact'or I52 of a switch havingtwo terminais I53 andI54. Electric current item source of supiil'y" ecn iictcr tst' is s p'iiee" to contactor' I52. 'ieriiiihal I54 is; chneeted' fey conductor I56a solenoid I51 of a ratehet relay designated ge'ile'i'allyby I58. Thecircuit through the seismic I51 ean he eemhieted through sie na I591lft'atchetreiay Is'afhas two contaethrs I6 0 ane sI ar nge to alteinately moved by so'lehoid r51 intoand hut er contact with two terminalsti and" its tively. The nicd'et of utterance of" the relay is asfollows:

energized; wiii'mcve chntactors I-tii anti It? sash and forth Betweentwepos tie s to tilt close arid eheiithe and Isak conttietcr I60servefin'aterial in the cutting hi I known mechanical devices.

connected with source of supply conductor I55. Terminal I63 is connectedby conductor I84 with one terminal of the solenoid I65 of an oil controlvalve I66 by which the flow of oil under pressure to the two cylinders50 and is controlled. The other terminal of the oil control valvesolenoid I65 is connected with ground I59. Conductor I84 also isconnected with a contactor I81 of a supervisory or holding relay I68. Aterminal I89 of relay I68 is connected with source of supply conductorI55. Contactor I81 is adapted to be moved into open and closed circuitposition by a solenoid I which has one terminal connected with groundI59 and the otherterminal connected by conductors HI and I56 with theterminal I54 of the cam operated switch. Other types of fluid canreplace oil.

The terminal I82 of ratchet relay I58 is connected through conductorI12, switch I13, conductor I14, switch I15, and conductor I18 with acontactor I11 of a strip feed relay I18. Strip feed relay I18 has twoterminals I19 and I88. The terminal I19 is connected'by conductor I8!with one terminal of a clutch release solenoid I82, the other terminalof solenoid I82 is connected with ground I59. The clutch release sole-'noid I82 controls the release of a single revolu tion clutch of standardconstruction indicate; generally by I83 and this clutch I83 controls theoperation of the strip feed driving shaft I3I and allows said shaft I3Ito make one complete revolution each time said single revolution clutchI83 is released by the energizing of solenoid I82. One revolutionclutches of this type are' well As illustrative of a one revolutionclutch which will accomplish this purpose, Fig. shows diagrammaticallyan inner clutch member I84 having peripheral cam surfaces I85 andfixedly secured to the shaft i3:'-. An outer constantly drivencylindrical member I88 as by belt I86A rotates aroundthe inner memberI84. A cylindrical roller cage I81 is disposed between the twomembersI84 and I88, rollers 88 are supported by the cage I81 and operativelydisposed between the members I84 and I88. A tension spring I89 isconnected between the roller cage I81 and the inner clutch member I84 torelatively move these two parts I81 and I84 and thus move the rollersI88 into locking engagement between the outer clutch member I88 and thecam surfaces I85 of the inner clutch member I84. A lug I90 on the rollercage I81 is adapted to be engaged by a pawl i9i which is connected withthe solenoid I82 and is adapted to be retracted by the energizing ofthis solenoid I82. the pawl I9I in the path of movement of the lug I90when the solenoid I82 is not energized. When the cage I81 is released bylifting of the pawl I9I the spring I92 will instantly move the rollersI88 into locking position and said cage I81 together with the member I84and shaft I3I will be locked to and rotate with the outer clutch memberI88. Upon completion of one revolution of the parts I3I, I84, I81 andI88 the shoulder I90 will contact the pawl I9I, which has been returnedto its initial holding position due to the de-energizing of solenoidI82, and the rollers I88 will be retracted allowing the constantlydriven-member I88 to continue to rotate while parts I3I, I84, I81 andI88 are restrained from rotation until the pawl I9I is again released bythe energizing of solenoid I82.

The de-energizing of solenoid I82 is controlled A spring I92 yieldinglypositions by a cam I93 on shaft I3I. A follower I94 on cam I93 isarranged to move a contactor I95 into contact with a terminal I96. Thecontactor I94 is connected with the conductor I18. The terminal I96 isconnected by conductor I91 with the terminal I of strip feed relay I18.Terminal I80 is connected by a conductor I98 with a solenoid I99 throughwhich a circuit can be completed to ground I59. v

Oil under pressure is supplied to the oil control valve I66 by Way ofconduit I49 which connects with an oil pump I48. nected by conduit I41with an oil reservoir I48. Preferably a pressure relief valve I45 isinterposed. in conduit means I49 and connected by a by-pass conduit I44with the reservoir I48. A return conduit I43 for oil connects the oilcontrol valve I68 with the reservoir I48.

In the conduit I42 connecting oil control valve I68 with hydrauliccylinders 50 and 5|, I preferably provide a fluid pressure transmittingmeans I42A which comprises a two part housing I42B having a flexiblediaphragm I42C. This means I42A operates to prevent the admission of airto the cylinders 59 and SI by maintaining a separation of the fluid onthe two sides of the diaphragm I420. This makes it possible to use twodifferent kinds of fluids or liquids or a liquid and a gas on theopposite sides of the diaphragm, thereby protecting sealing means.

The operation of the control means shown diagrammatically in Fig. 20 isas follows: The cam I5I and the member I86 of the single revolutionclutch which is connected with the shaft I3I are each continuouslydriven. Each time the follower I50 passes from the arcuate portion ontothe flat portion of the cam I5I a circuit will be closed from conductorI55 through contactor I52, terminal I54, conductor I58, and solenoid I51to ground I59. This energizing of solenoid I51 will operate ratchetrelay I58 and change the position of contactors I80 and I8I. It will beassumed that solenoid I51 is energized and has just moved contactors I80and I6I to break a previously closed contact with terminal I82 and closea previously broken contact with terminal I83. This completes a circuitfrom conductor I55, through contactor I6I, terminal I63, conductor I64and the solenoid I65 of oil control valve I86 to ground I59. Thecompletion of this circuit opens the oil control valve I88 and suppliespressure to the cylinders 50 and 5I through pressure transmitter meansI42A, Fig. 20. This causes the pistons in cylinders 50 and 5| to movethe strip of material I8 into engagement With the driven tool BI andclamp this arched strip I8 under tension against the upper plate 4Iwhere it is securely held while a patch is being cut. Incidentally theclosing of the circuit through terminal I54 of the cam operated switchalso completes a circuit from conductor I55, through terminal I54,conductor HI and solenoid I10 of the supervisory relay I88 to groundI59. The energizing of solenoid I10 closes a circuit through thesupervisory relay I88 from conductor I55, through terminal I69,contactor I61 and conductor I64 to the solenoid I of the oil valve I88.The closing of these circuits to and through the supervisory relay I88at this time in the cycle is immaterial but these circuits do perform auseful function each alternate time they are closed as hereinafterdescribed.

The flat portion of the cam I5I preferably maintains a closed circuitthrough terminal I54 while the cam is moving through an angle of aboutfifteen degrees. At the end of this ap- The pump I48 is conproximatelyfifteen degree travel of the cam -I5I', thefollower I50 is movedoutwardly and both of the previously described circuits to. solenoidsI51 and I10 are broken. Incidentally the contactor I52 is caused tocontact the terminal I53 at this time but this contact is immaterial atthis time in the cycle because the contactor IE is in an open circuitposition. Theposition of the. contactors of ratchet relay I53 are notchanged by the de-energizing of solenoid I51 and the circuit throughratchet relay I58 to the oil valve solenoid I65 is maintained closeduntil the cam II has made one complete revolution and is back to aposition where the follower I59 drops onto the flat surface of said cam.The cam I5I and the routing tool 6| revolve at the same rate of speedand in the same position relationship and while the cam has been movingone complete revolution from the assumed starting point the routing tool6i will have completed an oval out in the strip I8.

At this assumed starting point the follower I59 will again pass onto thefiat surface of the cam I5] and the circuits to the ratchet relaysolenoid I51 and the supervisory relay solenoid I19 will both again beclosed. This simultaneously closes a previously described circuitthrough the supervisory relay I68 to the oil valve solenoid I65 andbreaks a previously described circuit through the ratchet relay I58 tothe oil valve solenoid I65. Also it closes a circuit from conductor I55through contactor I52, terminal I53, conductor 200, contactor I 69,terminal I 52 and conductor I12 as far as then open safety switch I13.The closed circuit established through supervisory relay I68, as justdescribed, will hold the oil valve I66 open and keep the strip I8 ofveneer stock clamped against the upper plate 4| while the cam I5Icontinues to move through a further angle of about fifteen degrees andthe follower I50 remains on the flat portion of said cam. This providesfor about fifteen degrees overlap of the routing tool 6| while the workis clamped and held in its path. It has been found that this overlap inthe travel of the routing tool BI is desirable to insure that the patchwill be completely severed from the stock and will have time to dropdown on the plate.

I33 before the stock is lowered and advanced.

When the follower I59 again passes onto the raised portion of the camI5I the circuit through the supervisory relay I68 to the oil valvesolenoid I95 will be broken thus de-energizing solenoid I35. At the sametime circuits to the strip feed means will be closed as follows:Movement of the contactor I52 will break contact with terminal I5 5, inthe circuit of supervisory relay I 58, and make contact with terminalI53. The breaking of the circuit to the supervisory relay I58 andde-energizing of solenoid I65 will allow the oil valve I69 to change itsposition and this will exhaust the cylinders 59 and 5| and close theswitches I13 and I15. This completes a circuit from conductor I55through contactor I52, terminal I53, conductor 269, contactor I59,terminal I92, conductor I12, switch I13, conductor I14, switch I15,conductor I16, strip feed relay contactor I11, terminal I19, conductorISI and clutch release solenoid I 82 to ground I59. At the same time, itcompletes a circuit to the contactor I95, which is arranged to be movedbetween an open and a closed'position by the follower I99 of cam I93 onstrip feed drive shaft I3 I. The contac.. tor I1? of strip feed relayI18 is normally closed as respects terminal I19 and open as respectsterminal I89 but can be opened as respects terminal 14 I19 and closed asrespects terminal I30 bythe energizing of solenoid I99. 1

The energizing of the clutch release solenoid I82 releases the pawl I94and starts the operation of the one revolution clutch I83 to impart onerevolution to the shaft I3I and thereby feed the strip I9 of veneerforward a sumcient distance to provide material for the next patch.Shortly after shaft I3I begins to turn the cam I93 closes the circuitthrough contactor I95, terminal I96, conductor I91,-conductor I98, andsolenoid I 59 to ground I59. This moves contactor I11, breaks thecircuit through terminal I19 to clutch release solenoid I82 and closes aholding circuit through terminal I89 and conductor I98 to solenoid I 99.This keeps the circuit to the clutch release solenoid I82 de -energizedso that the clutch I 89 can complete one revolution and be stopped andheld by the pawl I94 with the follower 194 on the flat portion of thecam I93 and contactor I95 in open switch position, as respects terminalI96.

The above described operation of the one revolution clutch I93 takesplace while the cam I5I is moving through less than one complete revolution and the follower I59 is on the raised portion of said cam. passesonto the flat portion of the cam I5I the circuit through terminal I52 ofratchet relay I59 will be broken, the solenoid I99 'of strip feed ralayI18 will be de-ene gi-zed and another cycle will be started.

In the modified form, as shown in Fig. 16A, of-

the rotatable or roller means of the clutch member shown in Figs. 8 to16 inclusive, one of the fixed pin members I99 is replaced by a membergripping of the clutch controlling the feeding mechanism-such rotatablemember may be a roller or a ball.

The operation of this machine has been set forth hereinabove inconnection with the description of its parts and construction The modeof operation may be summarized as follows: Strips I8 from which patchesI 8' are to be made are placed on the supporting rolls [1 with theirfor;-

ward ends against the stop member 29 and with] the weight 2: resting onthese strips and the forward end portion of the lowermost strip restingon the feed roll 21. Power is supplied to continuously drive the routermotor 69 and the shaft 81 and the member I36 which operates through theone revolution clutch to intermittently drive the shaft I31. The shaft81 drives the gear wheels 99 and 83 and this operates the bracket meansshown in Fig. 6 and the parts carried thereby to move the routing toolSI in a path which corresponds to the path of movement of the axis ofthe cam roller6'8. The electrical devices shown in Fig. 20 operate insynchronized; relation to the patch making means and properlysynchronize the operation of the several parts:

of the machine.

The strip feed means and the hydraulic means for lifting and clampingthe strip while a patch" is being made operate alternately. The routingtool 9i makes a patch in the course of one revolution' and then idlesduring the next revolution while the strip I8 is being advanced.

The strips I 8 feed successivelycne after another as long as therearea'nystrips on the pile..'

As soon as the follower I 59 again- Obviously changes may be made in theforms, dimensions, and arrangement of parts of this invention, withoutdeparting from the principle thereof, the above setting forth onlypreferred forms of embodiment.

I claim:

1. In a routing machine, a plurality of cams; a U-shaped bracketsupported for swinging movement; a roller adjustably carried by saidbracket and selectively guided by one of said cams; a driven routingtool carried by said bracket; means operable to adjust said roller forengagement with different cams; means operable to feed sheet materialbetween said driven routing tool and said cam; and means operable toapply said sheet material to said driven routing tool.

2. In a routing machine, a plurality of cams; a U-shaped bracketsupported for swinging movement; a roller adjustably carried by saidbracket and selectively guided by one of said cams; a driven routingtool carried by said bracket; adjusting devices for selectivelypositioning the roller in engagement with a predetermined cam; meansoperable to feed sheet material between said driven routing tool andsaid cam;

supporting means for said sheet material and mechanism for relativelymoving said driven routing tool and said sheet material supporting meanstoward each other, whereby the tool is operatively engaged with thematerial.

3. In a routing machine, a table having an opening therein; table top; adouble pivoted two-arm mounted bracket supported by said table forcoplanar movement, one arm of said bracket being above said table topand the other arm below said table top; a motor driven routing toolcarried by the arm of said bracket above the opening in said table; acam follower roller carried by the other arm of said ing in said table,said follower roller and said routing tool being in axial alignment; afirst clamping plate located transversely of said opening, said tablehaving support means extending upwardly and on which said first clampingplate is adapted to rest, a second clamping plate movably mountedimmediately below said first clamping plate and below the upper edge ofsaid support means and between said support means; material feedingmeans located adjacent said support means whereby material may be fedbetween said first and second clamping plates; means for actuating saidsecond clamping plate against said material and in turn pressing saidmaterial against said first clamping plate whereby the material issupported therebetween and in the path of said routing tool.

4. In a routing machine, a patch pattern determining cam; a swingablysupported U-shaped bracket; a roller carried by one arm of said U-shaped bracket and guided by said cam; a driven routing tool carried bythe other arm of said bracket; a rotatable slidably mounted yokeconnected with said roller; a rotating means for said yoke; and aresilient holding means connected to said yoke urging said rolleragainst said cam.

,5. In a veneer patch making machine, a table; two veneer stripsupporting tracks fixedly supported above said table in end to endspaced apart relation; two relatively movable veneer strip holdingplates positioned in spaced apart relation between the adjacent ends ofsaid tracks,

each of said plates having an open central portion; material feedingmeans positioned to feed bracket below said open- 16 veneer strips alongsaid tracks and between said plates; plate moving means connected withsaid plates, whereby said plates can be moved toward and away fromeach'other to clamp and release a veneer strip; a tool carrying bracketmovably supported by said table; a driven routing tool carried by saidbracket and positioned a cam mounted beneath said 1 above said veneerstrip supporting plate,

to clamp above said table for'routing engagement with a veneer stripheld between said plates; a cam mounted on said table; a cam-followerroller guided by said cam and mounted on said bracket; actuating meansconnected to said cam -follower roller which imparts movement to saidtool in a path determined by said cam whereby patches are cut from aveneer strip; and. patch discharging means operable beneath said plates.

6. In a veneer patch making machine, a table; two veneer stri supportingtracks fixedlysupported above said table in end to end spaced apartrelation; a veneer strip supporting plate movably supported between theadjacent end portions of said two tracks normally substantially flushtherewith in its lowermost position; a veneer strip clamping platefixedly supported plates having Open central. portions; material feedingmeans positioned to feed veneer strips along said tracks and betweensaid plates; a tool carrying bracket movably' supported by said table; adriven routing tool carried by said bracket and positioned above saidtable with its cutting end portion extending through the opening in saidclamping plate; bracket moving means connected with said bracket; cammeans guiding said bracket providing movement to said tool in apredetermined path; a cam-follower roller guided by said cam and mountedon said bracket; actuating means connected to said cam-follower rollerwhich imparts movement to said tool in a path determined by said camsupporting plate moving means whereby said supporting plate is movedtoward said clamping plate and said tool a veneer strip and apply thesame to said tool; gear means connected to said roller actuating means;an electric contactor switch connected to said gear means whereby theabove parts of said machine are synchronized. V

7. In a machine of the class described, a table having an openingtherein; a first clamping plate disposed transversely with respect tosaid opening and having a routing tool clearance opening therein alinedwith the opening in said table,

said table having support means extending up wardly and on which saidfirst clamping plate is adapted to rest; and a movably mounted secondclamping plate disposed beneath said first clamping plate and positionedbetween said support means and having a material disposal openingtherein in alinernent with the opening in the first clamping platethrough which a completely routed patch may fall.

8. In a routing machine, a table; a cam mounted beneath said table top;a double pivoted two-arm mounted bracket supported by said table forcoplanar movement, one arm of said bracket being above said table topand the other arm below said table top; a motor driven routing toolcarried by the arm of said bracket above the table; a cam-followerroller carried by the other arm of said bracket, said follower rollerand said routing tool being in axial alignment; a roller cam contactingmeans for said roller resiliently and firmly urging said roller againstthe face of said cam; a motor driving means for said roller said two camcontacting means whereby said roller is resiliently and firmly heldagainst said cam thereby insuring said routing tool to be preciselymoved according to the pattern of the cam in providing a precisionproduct; supporting means for patch forming material; and mechanism forrelatively moving said patch forming material engaged by said patchsupporting means and said routing tool towards each other in cuttingrelation.

9. In a routing machine, a table; a, cam mounted beneath said table top;a double pivoted two-arm mounted bracket supported by said table forcoplanar movement, one arm of said bracket being above the said tabletop and the other arm below said table top; a motor driven routing toolcarried by the arm of said bracket above the table; a cam followerroller carried by the other arm of said bracket, said follower rollerand said routing tool being in axial alignment; a roller cam contactingmeans for said roller resiliently and firmly urging said roller againstthe face of said cam; a motor driving means for said roller camcontacting means whereby said roller is resiliently and firmly heldagainst said cam thereby insuring said routing tool to be preciselymoved according to the pattern of the cam in providing a precisionproduct; and supporting means contacting that portion of the patchforming material adjacent to the periphery of the patch wherebyvibration is prevented and precision of cutting is insured while thematerial is being treated by the routing tool.

10. In a routing machine, a table; an elliptical cam mounted beneathsaid table having the longitudinal axis of the cam extendinglongitudinally of the table; an opening in said table; a pivotallymounted sleeve freely movable in said opening having two arms integrallyformed therewith, one extending above and one below said table topforming a U-shaped bracket; a shaft mounting means for said sleeve; ahub mounted on said table; a shaft extending through said hubparalleling the shaft in said sleeve; bracket arms rotatably mounted onsaid hub shaft and upon said shaft of said sleeve whereby a freelycoplanar movable double pivoted mounted U-shaped bracket is provided; amotor driven routing tool carried by said upper arm; and a cam-followerroller carried by the lower arm of said U-shaped bracket and guided bysaid cam, whereby a combination results which provides for a movement ofthe routing tool in an elliptical path having the proper translationalmovement and transverse movement.

11. In a routing machine, a table; a cam adjacently mounted to and in aplane paralleling the top of said table; a double pivoted two-armmounted bracket mounted on said table for swinging movement, one arm ofsaid bracket being above said table top and the other arm below saidtable top; a cam follower-roller carried by one arm of said bracket andguided by said cam; a driven routing tool carried by the other arm ofsaid bracket and disposed in axial alignment with said cam followermeans operable to feed material to be routed between said driven routingtool and said cam; and means operable to apply said material to saiddriven routing tool.

12. In a routing machine, a table; a cam fixedly mounted on said table;a double pivoted two-arm freely movably mounted bracket supported bysaid table for coplanar movement, one arm of said bracket being abovesaid table top and the other arm below said table top; a verticallydissupplied between said posed shaft mounted on one arm of said bracket;a cam-follower roller mounted on said shaft; a driven routing toolcarried by the other of said arms; a rotatable slidable mounted yokeengaging said shaft of said cam-follower roller; a rotating means forsaid yoke; and a resilient means connecting said yoke to said rotatingmeans whereby said roller is resiliently and firmly urged against saidcam.

13. In a routing machine, a table; a cam fixedly mounted on said table;a double pivoted two-arm freely mounted bracket supported by said tablefor coplanar movement, one arm of said bracket being above said tabletop and the other arm below said table top; a cam-follower rollermounted on a shaft which is carried by one of said arms; a drivenrouting tool carried by the other of said arms; a rotatable slidablemounted yoke engaging said shaft of said cam-follower roller; a rotatingmeans for said yoke; a resilient means connecting said yoke to saidrotating means whereby said roller is resiliently and firmly urgedagainst said cam; intermittently operating feeding means whereby sheetmaterial may be driven routing tool and said cam; and supporting meansfor said sheet material comprising gripping members.

14. In a routing machine, a table; a hub mounting means carried by saidtable; a fixed shaft mounted in said hub; bracket arms carried by therespective end portions of said shaft; a fixed shaft mounted in andextending through the end portions of said bracket arms; a U-shapedbracket pivotally supported by the end portions of said last-mentionedshaft whereby said U-shaped bracket is floatingly and freely mounted; adriven routing tool carried by one of said bracket arms; a guide rollercarried by the other of said bracket arms in axial alignment with saidrouting tool; cam means fixedly carried by said table as a guiding meansfor said roller; material supporting means disposed between said cam andsaid routing tool; and an actuating means for said roller causing thesame to follow the face of said cam.

CHARLES A. SHERMAN.

References Cited in the file Of this patent UNITED STATES PATENTS NumberName Date 339,444 Markee Apr. 6, 1886 362,513 Johnson May 10, 1887394,766 Goehring Dec. 18, 1888 494,771 Austin Apr. 4, 1893 573,050 TaftDec. 15, 1896 645,329 Platt Mar. 13, 1900 769,980 Borg Sept. 13, 19041,083,160 Villinger Dec. 30,1913 1,144,067 Rundlof June 22, 19151,566,407 Kelbrick Dec. 22, 1925 1,569,490 Hiscock Jan. 12, 19261,607,895 Karr Nov. 23, 1926 1,674,602 Madsen June 19, 1928 1,777,286Aldeen Oct. 7, 1930 1,805,437 Blood et al May 12, 1931 1,869,593 Johnsonet a1 Aug. 2, 1932 1,995,505 Goss et al Mar. 26, 1935 2,071,519 GraggFeb. 23, 1937 2,091,450 Miller Aug. 31, 1937 2,189,930 Schurmann Feb.13, 1940 2,308,996 Miller Jan. 19, 1943 2,314,179 Teague Mar. 16, 19432,336,704 Skoog Dec. 14, 1943 2,358,595 Robbins Sept. 19, 1944 2,378,676Ambruster June 19, 1945

